CVE-2019-3855 (GCVE-0-2019-3855)

Vulnerability from cvelistv5 – Published: 2019-03-21 20:13 – Updated: 2025-12-17 21:40
VLAI?
Summary
An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.
Severity ?
7.5 (High)
CVSS:3.0/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE
Assigner
References
http://www.openwall.com/lists/oss-security/2019/03/18/3 mailing-listx_refsource_MLIST
https://seclists.org/bugtraq/2019/Mar/25 mailing-listx_refsource_BUGTRAQ
https://www.libssh2.org/CVE-2019-3855.html x_refsource_MISC
https://bugzilla.redhat.com/show_bug.cgi?id=CVE-2… x_refsource_CONFIRM
http://packetstormsecurity.com/files/152136/Slack… x_refsource_MISC
http://www.securityfocus.com/bid/107485 vdb-entryx_refsource_BID
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://www.broadcom.com/support/fibre-channel-ne… x_refsource_CONFIRM
https://lists.debian.org/debian-lts-announce/2019… mailing-listx_refsource_MLIST
https://security.netapp.com/advisory/ntap-2019032… x_refsource_CONFIRM
https://access.redhat.com/errata/RHSA-2019:0679 vendor-advisoryx_refsource_REDHAT
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
http://lists.opensuse.org/opensuse-security-annou… vendor-advisoryx_refsource_SUSE
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://www.debian.org/security/2019/dsa-4431 vendor-advisoryx_refsource_DEBIAN
https://seclists.org/bugtraq/2019/Apr/25 mailing-listx_refsource_BUGTRAQ
https://access.redhat.com/errata/RHSA-2019:1175 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:1652 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:1791 vendor-advisoryx_refsource_REDHAT
https://access.redhat.com/errata/RHSA-2019:1943 vendor-advisoryx_refsource_REDHAT
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://lists.fedoraproject.org/archives/list/pac… vendor-advisoryx_refsource_FEDORA
https://access.redhat.com/errata/RHSA-2019:2399 vendor-advisoryx_refsource_REDHAT
https://support.apple.com/kb/HT210609 x_refsource_CONFIRM
https://seclists.org/bugtraq/2019/Sep/49 mailing-listx_refsource_BUGTRAQ
http://seclists.org/fulldisclosure/2019/Sep/42 mailing-listx_refsource_FULLDISC
https://www.oracle.com/technetwork/security-advis… x_refsource_MISC
Impacted products
Vendor Product Version
The libssh2 Project libssh2 Affected: 1.8.1
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\"https://seclists.org/bugtraq/2019/Sep/49\", \"name\": \"20190927 APPLE-SA-2019-9-26-7 Xcode 11.0\", \"refsource\": \"BUGTRAQ\"}, {\"url\": \"http://seclists.org/fulldisclosure/2019/Sep/42\", \"name\": \"20190927 APPLE-SA-2019-9-26-7 Xcode 11.0\", \"refsource\": \"FULLDISC\"}, {\"url\": \"https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html\", \"name\": \"https://www.oracle.com/technetwork/security-advisory/cpuoct2019-5072832.html\", \"refsource\": \"MISC\"}]}, \"data_format\": \"MITRE\", \"description\": {\"description_data\": [{\"lang\": \"eng\", \"value\": \"An integer overflow flaw which could lead to an out of bounds write was discovered in libssh2 before 1.8.1 in the way packets are read from the server. A remote attacker who compromises a SSH server may be able to execute code on the client system when a user connects to the server.\"}]}, \"problemtype\": {\"problemtype_data\": [{\"description\": [{\"lang\": \"eng\", \"value\": \"CWE-190\"}]}, {\"description\": [{\"lang\": \"eng\", \"value\": \"CWE-787\"}]}]}, \"data_version\": \"4.0\", \"CVE_data_meta\": {\"ID\": \"CVE-2019-3855\", \"STATE\": \"PUBLIC\", \"ASSIGNER\": \"secalert@redhat.com\"}}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2019-3855\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2025-12-17T21:40:11.249Z\", \"dateReserved\": \"2019-01-03T00:00:00.000Z\", \"assignerOrgId\": \"53f830b8-0a3f-465b-8143-3b8a9948e749\", \"datePublished\": \"2019-03-21T20:13:25.000Z\", \"assignerShortName\": \"redhat\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


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Taxonomy of the tags.




Sightings

Author Source Type Date

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.



Detection rules are retrieved from Rulezet.